Below are maps of the exact location of every registered Democrat and Republican in every metropolitan area in the United States.  The maps were created by Ryan Enos and Jacob Brown using data from L2 as part of the Partisan Segregation Project (technical details).

Alaska

Alabama

Arkansas

Arizona

California

Colorado

Connecticut

Delaware

District of Columbia

Florida

Georgia

Hawaii

Iowa

Idaho

Illinois

Indiana

Kansas

Kentucky

Louisiana

Massachusetts

Maryland

Maine

Michigan

Minnesota

Missouri